Joseph Larmor (1857-1942). From Queen's University in Belfast Larmor went to Cambridge, where he bested Thomson in the mathematical exams. After a stint teaching in Galway, Larmor spent most of his career as a Cambridge professor. His elaborately mathematical electrical theory of the late 1890s included the "electron" as a rotational strain (a sort of twist) in the ether. Many physicists envisioned both material particles and electromagnetic forces as structures and strains in that hypothetical fluid.

AIP Emilio Segrè Visual Archives, Physics Today Collection.

1997- American Institute of Physics